Shower Presentations with R Markdown
Guillermo Basulto-Elias
Why we need a shoeprints database?
- What are reliable and accurate methods to quantify the similarity between two outsole prints?
- How robust are those methods to degradation of the crime scene print?
- What is the best instrument to “measure” outsole images? (We are using at least five different instruments).
- What is the persistence of outsole patterns over time? Or, can we identify the source of a print even after the shoe has been used for period of weeks or months?
Details
- Provide a pair of shoes to 160 persons (ISU students, staff, faculty and external)
- Roughly half men and half women
- Half one shoe pattern and half the other
- Take measurements every six weeks (baseline + four times)
Shoe models
- Contrained to:
- current and future availability
- One athletic and one more casual
- Nike Winflow 4 (left)
- Adidas Seeley (right)

Restrictions for impressions
- Time it takes to take each impression
- Adapt to schoolyear dates
- Tidiness of the space
3D Scans

2D Scans

High Resolution Picture
- Modes: 2 (different lighting)
- Format: TIFF
